196443491 has 2 divisors, whose sum is σ = 196443492. Its totient is φ = 196443490.

The previous prime is 196443469. The next prime is 196443523. The reversal of 196443491 is 194344691.

It is a weak prime.

It is an emirp because it is prime and its reverse (194344691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196443491 - 2⁶ = 196443427 is a prime.

It is not a weakly prime, because it can be changed into another prime (196443791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98221745 + 98221746.

It is an arithmetic number, because the mean of its divisors is an integer number (98221746).

Almost surely, 2^196443491 is an apocalyptic number.

196443491 is a deficient number, since it is larger than the sum of its proper divisors (1).

196443491 is an equidigital number, since it uses as much as digits as its factorization.

196443491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 196443491 is about 14015.8300146656. The cubic root of 196443491 is about 581.3163630861.

The spelling of 196443491 in words is "one hundred ninety-six million, four hundred forty-three thousand, four hundred ninety-one".